The Ba2LnFeNb4O15 Tetragonal Tungsten Bronze: towards RT composite multiferroics

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dc.creatorJosse, M.
dc.creatorBidault, O.
dc.creatorRoulland, F.
dc.creatorCastel, E.
dc.creatorSimon, A.
dc.creatorMichau, D.
dc.creatorVon der Muhll, R.
dc.creatorNguyen, O.
dc.creatorMaglione, M.
dc.date2007-07-20
dc.date2008-06-26
dc.date.accessioned2026-07-07T09:46:28Z
dc.date.available2026-07-07T09:46:28Z
dc.descriptionSeveral Niobium oxides of formula Ba2LnFeNb4O15 (Ln = La, Pr, Nd, Sm, Eu, Gd) with the Tetragonal Tungsten Bronze (TTB) structure have been synthesised by conventional solid-state methods. The Neodymium, Samarium and Europium compounds are ferroelectric with Curie temperature ranging from 320 to 440K. The Praseodymium and Gadolinium compounds behave as relaxors below 170 and 300 K respectively. The Praseodymium, Neodymium, Samarium, Europium and Gadolinium compounds exhibit magnetic hysteresis loops at room temperature originating from traces of a barium ferrite secondary phase. The presence of both ferroelectric and magnetic hysteresis loops at room temperature allows considering these materials as composites multiferroic. Based on crystal-chemical analysis we propose some relationships between the introduction of Ln3+ ions in the TTB framework and the chemical, structural and physical properties of these materials.
dc.descriptionRevised version after identification of a spurious barium ferrite phase responsible for composite multiferroic properties at RT. Appearance of this parasitic phase is correlated to the crystal-chemistry of the Ba2LnFeNb4O15 TTBs. Submitted to Solid State Sciences. 27 pages, 7 figures, 3 tables
dc.identifierhttps://arxiv.org/abs/0707.3112
dc.identifierhttp://arxiv.org/abs/0707.3112
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163544
dc.subjectMaterials Science
dc.titleThe Ba2LnFeNb4O15 Tetragonal Tungsten Bronze: towards RT composite multiferroics
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